Novel Immobilized Hydrosilylation Catalysts Based on Rhodium 1,3-Bis(2,4,6-trimethylphenyl)-3,4,5,6-tetrahydropyrimidin-2-ylidenes
作者:Nicolas Imlinger、Klaus Wurst、Michael R. Buchmeiser
DOI:10.1007/s00706-004-0255-3
日期:2005.1
were reached. A supported version of 1 was realized by reaction of RhCl( NHC )( COD ) with PS - DVB –CH2–O–CO–CF2–CF2–CF2–COOAg ( PS - DVB = poly(styrene- co -divinylbenzene) to yield PS - DVB –CH2–O–CO–CF2–CF2–CF2–COORh( NHC )( COD ). This supported version of 1 exhibited at least comparable, in some cases increased reactivity compared to 1 and allowed the rapid removal of the catalyst from the reaction
明确定义的Rh(I)配合物的反应性, 即 Rh(CF 3 COO)( NHC )( COD )( 1 , NHC = 1,3-双(2,4,6-三甲基苯基)-3,4,5 ,6-四氢嘧啶-2-亚基, COD =η 4 -cycloocta -1,5-二烯)的1-烯烃,炔烃,和α,β不饱和羰基化合物,分别描述的氢化硅烷化。使用这种配合物,观察到优异的反应性,并且达到了高达1000的周转数(TONs)。的支持的版本 1 通过的RhCl(的反应实现 NHC )( COD )与 PS - DVB –CH 2 –O–CO–CF 2 –CF 2 –CF 2 –COOAg( PS - DVB =聚(苯乙烯- 共 -二乙烯基苯)产生 PS - DVB –CH 2 –O–CO–CF 2 –CF 2 –CF 2 –COORh( NHC )( COD )。该支持版本 1 至少具有可比性,在某些情况下,与 1 相比,其反应性增强